Ok, I follow the lines, which one is supposed to have the banjo fitting on the end?

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1986 300SDL

Per the picture and explanations, mine doesn't seem to have that banjo fitting. Am I just missing it?

Attached Thumbnails

 

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1986 300SDL

There are no banjo fittings on the lines from the manifold to and from the overboost protection valve on the 603. The 617 engine has the banjo fitting.

OK, so I took off the little hose fitting that goes into the manifold, it was a little gunked up, cleaned it out good, drove the car, no change. Still need to rev to almost 3000 rpm to get moving. Do I need to clean up in the hole that the fitting came out of, or do I need to remove the intake and adjust the ALDA or could it be a fuel filter. Sorry for all the questions.

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1986 300SDL

Welcome to the forum!

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1981 300D 147k
1998 VW Jetta Tdi 320k
2001 Dodge Ram 2500 141k
1979 300D 234k (sold)
1984 300D "Astor" 262k(sold)
Mercedes How-To and Repair Pictorials
I love the smell of diesel smoke in my hair

If the end of the line was gunked up, then the intake manifold fitting might be also. A pipe cleaner with a little brake cleaner does an excellent job.

How much of the line was clogged? If very much, the over boost protection switch may need to be cleaned also.

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Sam

84 300SD 350K+ miles ( Blue Belle )

We don't know if the performance of the vehicle is not acceptable or the expectations of the driver are unreasonable.

Can you kindly do a couple of 0-60 times with a stopwatch and report back?

Hi Again,
Well we took it out and did 3 runs. The times were in this order, 40 sec, 32 sec, and 32 sec. Whats the verdict?

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1986 300SDL

Well, that's an unmigitated disaster. You've got some serious issues and we need to start with the basics.

1) Fuel filters, primary and secondary, .........changed when?


BTW, we're looking for an ET of 12 seconds.

Just got the car last week, haven't done much to it. Is the primary fuel filter the screw on just behind the radiator. Where is the secondary?

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1986 300SDL

also if the blue smoke on startup is accompanied by rough running for 20 or thity seconds you may have one or more dead glow plugs.

i agree way too slow! that makes even the legendary turtle the 240d look quick.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

The primary is the plastic inline filter before the lift pump.

The secondary looks like a small oil filter and sits at the front of the head on the left side. It's secured with a bolt from the top.

After I put on the new secondary, is the priming pump the lever on the side of the ip that has a red "stop" sticker on it?

Also can the primary fuel filter (the plastic one) be any kind of inline filter?

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1986 300SDL

No priming pump for you.........starter motor is the priming pump.........hence the need to fill the secondary to the absolute brim with fresh diesel fuel.

No advice on that.......I use OEM.

I changed the secondary, not a noticealbe change in throttle response, didn't time the run, just drove it. Is the primary filter the little white plastic thing in the bottom center pic on one of my previous post. Its about 3" long and the outlet is at 90 degrees to the inlet. My local Napa doesn't list a filter to replace the primary.

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1986 300SDL